﻿<!DOCTYPE html>
<html>
	<head>
		<title>T.DIST Function</title>
		<meta charset="utf-8" />
		<meta name="description" content="" />
		<link type="text/css" rel="stylesheet" href="../../../../../../common/main/resources/help/editor.css" />
		<link type = "text/css" rel = "stylesheet" href = "../../images/sprite.css" />
        <script type="text/javascript" src="../callback.js"></script>
        <script type="text/javascript" src="../search/js/page-search.js"></script>
	</head>
	<body>
		<div class="mainpart">
            <div class="search-field">
                <input id="search" class="searchBar" placeholder="Search" type="text" onkeypress="doSearch(event)">
            </div>
			<h1>T.DIST Function</h1>
			<p>The <b>T.DIST</b> function is one of the <a href="../UsageInstructions/InsertFunction.htm#statistical" onclick="onhyperlinkclick(this)">statistical functions</a>. Returns the Student's left-tailed t-distribution. The t-distribution is used in the hypothesis testing of small sample data sets. Use this function in place of a table of critical values for the t-distribution.</p>
			<h3>Syntax</h3> 
			<p><b><em>T.DIST(x, deg_freedom, cumulative)</em></b></p> 
			<p>The <b>T.DIST</b> function has the following arguments:</p> 
			<table style="width: 40%">
                <tr>
                    <th style="background-color: #f4f4f4" width="150ch"><b>Argument</b></th>
                    <th style="background-color: #f4f4f4"><b>Description</b></th>
                </tr>
                <tr>
                    <td><b><em>x</em></b></td>
                    <td>The value at which the function should be calculated.</td>
                </tr>
				<tr>
                    <td><b><em>deg_freedom</em></b></td>
                    <td>The number of degrees of freedom, an integer greater than or equal to 1.</td>
                </tr>
				<tr>
                    <td><b><em>cumulative</em></b></td>
                    <td>A logical value (TRUE or FALSE) that determines the function form. If it is TRUE, the function returns the cumulative distribution function. If it is FALSE, the function returns the probability density function.</td>
                </tr>
            </table>
            <h3>Notes</h3>
 			<p><a href="../UsageInstructions/InsertFunction.htm#applyfunction" onclick="onhyperlinkclick(this)">How to apply</a> the <b>T.DIST</b> function.</p>
			
			<h3>Examples</h3>
            <p>The figure below displays the result returned by the <b>T.DIST</b> function.</p>
			<p><img alt="T.DIST Function" src="../images/t-dist.png" /></p>
		</div>
	</body>
</html>